Question: which office building with the highest floors above ground whose instance is skyscraper?
Paraphrase: What is the tallest skyscraper with offices?
SPARQL (Wikidata): select ?ent where { ?ent wdt:P31 wd:Q1021645 . ?ent wdt:P1101 ?obj . ?ent wdt:P31 wd:Q11303 } ORDER BY DESC(?obj)LIMIT 5 
Answer: Willis Tower, Willis Tower, Empire State Building, 875 North Michigan Avenue, One World Trade Center